AnsweredAssumed Answered

Fail source cal at 50Ghz

Question asked by jacinta on Feb 18, 2014
Latest reply on Feb 19, 2014 by Dr_joel

i tried performing source cal at port 1, power = -6dBm(tolerance 0.05dBm) with N5245A PNA-x connecting thru 85133-60016 gore cable using E4419B power meter and 8487A power sensor. It cal thru 18GHz till 50GHz and it fails cal at almost 50Ghz showing unlevel source1 out 1. it passed the call if we skip the gore cable and directly fix the power sensor to the PNA-X port 1.

when i tried to perform source cal with the same setting on port 3, it passed the cal.

what could be the possible reason for it to fail at 50GHz?